I have replaced tps and checked all fire and fuel. replaced map sensor with another(not new but from working vehicle) and no change. Checked temp sensor, control module, and coil as well.
SOURCE: my son's gmc 4.3l hesitates upon acceleration. I
do you have any check engine lights on? If you do, that is the first thing I would have checked. It does sound like plugged EGR, vacuum leak, or bad TPS
SOURCE: 97 gmc sierra no fuel no spark replaced ign module
1996 GMC 1500 Pickup.
Replaced Coil, Dist cap/Rotor, Ign Mod & pick-up.
All showed to be bad with OHM meter.
20A ECM-B fuse keeps blowing out and I'm afraid to burn these new parts up....
ANY IDEAS OUT THERE???
SOURCE: I have 96 gmc 350 vortec. missing really bad. Ive
ou need to check compression on all the cly. do you know which cly is dead?
SOURCE: I have A 1991 GMC SIERRA, 350,no fuel no spark,
Do you have power to the injectors? One of the wires to the injector will come on for a couple seconds as soon as you turn the key to the on position.The computer controls the ground side. If you do not get power to one of them start looking for an open circuit. The same power source will also go to your ignition coil and ignition module. If you do not have power on the pink wire to the coil apply a temporary fused battery power source to it and give it a try, this will also power up the injectors.
Check it out and let me know.
SOURCE: 1991 4.3L GMC Jimmy S-15 will not start. Turns
You need 3 things.
Compression
Good hot blue spark to all plugs.
Good gasoline and proper fuel pressure. 13-13.5 lbs on your TBI
If you have all 3 then move on to injector pulse to both injectors.
Keep me posted and recheck your spark plug wire to make sure they are not crossed. firing order 1-2-3-4-5-6 cylinder # passenger side 1-3-5 front to back. cylinder # drivers side 2-4-6 front to back
distributor #1 is located at the 7 o"clock and rotates clock wise so next distributor post on the right working clock wise is #2. Good luck and hope this helps.
Please see my tip at http://www.fixya.com/cars/r7427423-fix_poor_idle_high_idle_stalling_fuel . These are generic instructions. If you get stuck or need specific instructions for your car, please get back to me with model, year and engine info.
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update: also I have watched the injectors, they seem to loose pressure when I plug in the map or tps.
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